Error: Security Token did not match. Possible CSRF attack.

[PlantpotKiller]

Hello,

I'm not sure why this Error (Security Token did not match. Possible CSRF attack.) is happening when changing the template to "sprintdoc", but this Error doesn't let me do a thing. DokuWiki is working fine with every other template and I already tried disabling all the extensions to rule this common error out.

Furthermore (I don't know if this Error is related to the one above) but it doesn't recognize the files I already created and simply says they don't exist. Even files such as 'start.txt' -> simply states "doesn't exist yet, add content".

Perhaps someone can help me out on this... I figured it might be template-related since everything is working just fine with the others I tried. (Also, just in case this is an important detail: I use dokuwiki on a stick)

Thanks in advance!