Hello Andreas,
Apologies that you are running into these issues.
Could you raise this as a support case through your dealer as this will trigger various support processes.
The first three digits of the latest version is 1.5.1 and was released in July.
Did this start immediately on upgrade affecting all jobs and all projects?
Did you upgrade in July or more recently?
I am aware of an issue where if the fxl was selected to be sent to TBC the Import to TBC process would fail.
The workaround in this case is to deselect the fxl after selecting Import to TBC
The tracelog segment you flagged does not seem to show the same error. It would be useful to get this sent in via the support channel
Thanks and regards
Chay