Error message when installing qupath-extension-align-0.4.0.jar

[samewinguf]

I am a new QuPATH user, using version 0.4.3. I am looking to align serial sections for multiplex immunofluorescence stains.

I downloaded the "qupath-extension-align-0.4.0.jar" file from this page. I followed the instructions on the following webpage to install the extension: https://qupath.readthedocs.io/en/0.4/docs/intro/extensions.html

I dragged the .jar file into the main QuPATH window and selected a user directory to store the extension in. However, it did not properly import. I closed QuPATH and reopened as recommended. The following error message came up (see attached photo). It seems that it is incompatible with my QuPATH version. I know the .jar file says 0.4.0 and my version is 0.4.3, but I assumed this extension would be compatible with all 0.4.x versions. Maybe this is the issue though?

I am very new to both QuPATH and coding in general, so am not sure where to start with troubleshooting.

Thanks!