If you have access to files (ssh or ftp) you can try to edit this line File "...web2py/applications/admin/controllers/default.py" <https://192.168.1.102/admin/default/edit/admin/controllers/default.py>, line 113, in check_version
+ XML(' <strong class="upgrade_version">%s</strong>' % version_number) and change to + XML(' <strong class="upgrade_version">%s</strong>' % str(version_number)) Including str(version_number) and saving, now you can try to click on check for upgrade and it will work! --