Your session only lasted less than 10 seconds. If you have not logged out yourself, this could mean that there is some installation problem or that you may be out of diskspace. Try logging in with one of the failsafe sessions to see if you can fix this problem.
Fe barodd eich sesiwn llai na 10 eiliad. Os nad ydych chi wedi allgofnodi eich hunan, fe all hyn olygu fod yn a rhyw broblem sefydliad neu fod prinder lle ar y disg. Ceisiwch fewngofnodi gydag un o'r sesiynau difethiant er mwyn gweld os gallwch drwsio'r broblem.