I did an upgrade from Magento CE 184.108.40.206 --> 1.9.1 in my staging environment The frontend is just working fine but the backend gives me the headache. * I can't login. It only shows a white screen and no errors.
I've read that this could be caused by bad themes or plugins. So install it once again in 220.127.116.11 and setup the default/deafult theme and remove all the plugins (set to false in /etc/modules). Did the upgrade once again but sadly with the same result.
I followed the hints on this page: Fundamentals for debugging a Magento store but still no login possible and neither clues or errors.
I've a log-file during the upgrade and all seems well but 2 issues:
Checking dependencies of packages Package community/Mage_Core_Modules failed: Detected Mage_Core_Modules conflict of versions: 18.104.22.168-22.214.171.124 and 126.96.36.199-188.8.131.52 Installing package community/Mage_All_Latest 184.108.40.206 Package community/Mage_All_Latest 220.127.116.11 installed successfully Installing package community/Interface_Adminhtml_Default 18.104.22.168 Error: install: Failed to open file /home/schapenv/public_html/staging/downloader/.cache/community/Interface_Adminhtml_Default-22.214.171.124/app/design/adminhtml/default/default/template/downloadable/sales/order/invoice/create/items/renderer Installing package community/Interface_Frontend_Default 126.96.36.199
Is this a clue why I can't login?