Hi Tomas,
Sorry to hear you are having trouble with the update.
The error reads like the update did not complete and some remaining old parts are trying to access files that have been renamed.
If you have FTP access to the website, I would suggest renaming the existing tm-beans folder (e.g. to old-tm-beans) and uploading the unzipped tm-beans folder from version 1.5.
Christoph
Thank you so much Christoph!! Problem solved. Oh my God, I don't understand why I didn't think of this before. I was obsessed with a server configuration problem. I uploaded the new version via FTP and everything works perfectly. Thanks! Tomas