Why do I get an error when I try to align Java properties

Hi everyone,

there is a Passolo project with Java properties files, and the engineering team has added strings to the source and the target file. To update the project, I want to import the target strings from engineering using the alignment function. However, my Passolo installation seems to suddenly have lost the ability to align Java properties. After the first problems, I tried a number of very different properties files, but Passolo always reports the file to be invalid.

ERROR - File *.properties is not a valid Java resource file.

The files look perfectly fine to me. This also happens with files created by Passolo itself some days and even months ago. A restart of my computer didn't help either. Any ideas?

Kind regards, and thank you for any help