user5629: $ nix --version
nix (Nix) 2.5.1

$ ghci --version
The Glorious Glasgow Haskell Compilation System, version 8.10.4.20210212

$ cat /etc/issue
Ubuntu 21.10 \n \l

I have the plutus playground server running inside a nix-shell in another terminal:
$ netstat -natlp | grep plutus
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 0.0.0.0:8080            0.0.0.0:*               LISTEN      3772215/plutus-play

Then i get into another nix-shell, cd to the plutus-playground-client (i already did git checkout 41149926c108c71831cfe8d244c83b0ee4bf5c8a) and run npm start or npm run start
This is what i'm getting anyway:
16:33 :) ../plutus-playground-client # npm start

> plutus-playground-client@1.0.0 start /home/atcasanova/plutus/plutus-apps/plutus-playground-client
> plutus-playground-generate-purs && npm install && npm run install:spago && npm run build:webpack:dev

[Info] Running: (Nothing,PSGenerator {_outputDir = "generated"})
The following purescript packages are needed by the generated code:

  - plutus-playground-client
  - purescript-argonaut-codecs
  - purescript-either
  - purescript-enums
  - purescript-lists
  - purescript-maybe
  - purescript-newtype
  - purescript-ordered-collections
  - purescript-prelude
  - purescript-profunctor-lenses
  - purescript-tuples
  - web-common

Successfully created your PureScript modules!

Successfully created your servant API purescript functions!
Please make sure you have purescript-servant-support and purescript-bridge-json-helpers installed

plutus-playground-server: user error (Error evaluating simulation: InterpreterError (CompilationErrors [RawError "/nix/store/xvj7mn015p98yypgwvzk4cq31b9j5xq7-plutus-ledger-constraints-lib-plutus-ledger-constraints-0.1.0.0/lib/x86_64-linux-ghc-8.10.4.20210212/libHSplutus-ledger-constraints-0.1.0.0-EN1avZ1OL0p63dNgqFuLBm-ghc8.10.4.20210212.so: undefined symbol: plutuszmledgerzmapizm0zi1zi0zi0zmKIxxnVyHrLq1ei02VYnb9P_PlutusziV1ziLedgerziBytes_zdwzdcshowsPrec_info\n"]))
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! plutus-playground-client@1.0.0 start: `plutus-playground-generate-purs && npm install && npm run install:spago && npm run build:webpack:dev`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the plutus-playground-client@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2022-01-13T19_34_10_171Z-debug.log



user5629: I guess it's fixed.
At first i was running the ubuntu-packed version of nix-bin, which was 2.3.10.
I then downloaded the newest version of nix following these instructions.
After loading the new version (since i've installed it with the --no-daemon flag i had to load a shell script) it kept malfunctioning. Then another user on the discord channel told me it would be nice to do a garbage collect and rebuild the server since i changed versions.
nix-collect-garbage
nix-build -A plutus-playground.server

It took a few hours but when it was done i've got everything running.

user5578: I was able to overcome this issue by running GC_DONT_GC=1 npm start.

5629: <pre><code>$ nix --version
nix (Nix) 2.5.1

$ ghci --version
The Glorious Glasgow Haskell Compilation System, version 8.10.4.20210212

$ cat /etc/issue
Ubuntu 21.10 \n \l
</code></pre>
<p>I have the plutus playground server running inside a nix-shell in another terminal:</p>
<pre><code>$ netstat -natlp | grep plutus
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 0.0.0.0:8080            0.0.0.0:*               LISTEN      3772215/plutus-play
</code></pre>
<p>Then i get into another nix-shell, cd to the plutus-playground-client (i already did git checkout 41149926c108c71831cfe8d244c83b0ee4bf5c8a) and run <code>npm start</code> or <code>npm run start</code></p>
<p>This is what i'm getting anyway:</p>
<pre><code>16:33 :) ../plutus-playground-client # npm start

&gt; plutus-playground-client@1.0.0 start /home/atcasanova/plutus/plutus-apps/plutus-playground-client
&gt; plutus-playground-generate-purs &amp;&amp; npm install &amp;&amp; npm run install:spago &amp;&amp; npm run build:webpack:dev

[Info] Running: (Nothing,PSGenerator {_outputDir = &quot;generated&quot;})
The following purescript packages are needed by the generated code:

  - plutus-playground-client
  - purescript-argonaut-codecs
  - purescript-either
  - purescript-enums
  - purescript-lists
  - purescript-maybe
  - purescript-newtype
  - purescript-ordered-collections
  - purescript-prelude
  - purescript-profunctor-lenses
  - purescript-tuples
  - web-common

Successfully created your PureScript modules!

Successfully created your servant API purescript functions!
Please make sure you have purescript-servant-support and purescript-bridge-json-helpers installed

plutus-playground-server: user error (Error evaluating simulation: InterpreterError (CompilationErrors [RawError &quot;/nix/store/xvj7mn015p98yypgwvzk4cq31b9j5xq7-plutus-ledger-constraints-lib-plutus-ledger-constraints-0.1.0.0/lib/x86_64-linux-ghc-8.10.4.20210212/libHSplutus-ledger-constraints-0.1.0.0-EN1avZ1OL0p63dNgqFuLBm-ghc8.10.4.20210212.so: undefined symbol: plutuszmledgerzmapizm0zi1zi0zi0zmKIxxnVyHrLq1ei02VYnb9P_PlutusziV1ziLedgerziBytes_zdwzdcshowsPrec_info\n&quot;]))
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! plutus-playground-client@1.0.0 start: `plutus-playground-generate-purs &amp;&amp; npm install &amp;&amp; npm run install:spago &amp;&amp; npm run build:webpack:dev`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the plutus-playground-client@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2022-01-13T19_34_10_171Z-debug.log
</code></pre>
<pre><code></code></pre>
 5629: <p>I guess it's fixed.</p>
<p>At first i was running the ubuntu-packed version of nix-bin, which was 2.3.10.
I then downloaded the newest version of nix following <a href="https://nixos.org/download.html" rel="nofollow noreferrer">these instructions</a>.</p>
<p>After loading the new version (since i've installed it with the --no-daemon flag i had to load a shell script) it kept malfunctioning. Then another user on the discord channel told me it would be nice to do a garbage collect and rebuild the server since i changed versions.</p>
<pre><code>nix-collect-garbage
nix-build -A plutus-playground.server
</code></pre>
<p>It took a few hours but when it was done i've got everything running.</p>
 5578: <p>I was able to overcome this issue by running <code>GC_DONT_GC=1 npm start</code>.</p>
