I am trying to deploy a Java project into Google App Engine from Eclipse and am blocked by JSPs. Everything JSP makes my app not capable of deploying due to "'utf8' codec can't decode byte" error. Not trying to insert any strange (not UTF-8) character, everything Eclipse is set to UTF-8. Tried to send archives which were OK with the Google App Engine Tools for Eclipse (soon to be deprecated), won't deploy. I've seen threads regarding reverting the Google Cloud Tools for Eclipse plugin to previous version (1.58 seemed to avoid a few problems) being a possible solution to these recent errors but I have a problem installing, the batch just tells me "Install will exit" ?! Tried to uninstall previous (latest) versions before, made sure I was launching the bundled-python batch, still not capable of installing an old version of the Google Cloud SDK shell. Would be glad if anybody had any suggestion at what makes my install fail.
Thanks in advance.