[SOLVED] Upgrade 11.5 -> 12.4: Install tool hangs on "Initializing"

TYPO3 Questions Installation
1

Hi there,

I’m trying to upgrade a legacy installation from 11.5.41 to 12.5.27. Before changing the symlink, I updated the reference index (as recommended by Pre-upgrade tasks — TYPO3 Explained 12.4 documentation) and unloaded all local extensions. When trying to access the install tool after switching the symlink to the 12.5.27 source, I end up with a site saying “Initializing” which seems to hang forever. When reloading, I get a completely blank page. What I find odd is that the page’s html code contains a <script…> tag bearing an empty src attribute.
The typo3 command line tool, however, seems to work fine; I can e.g. run the upgrade wizard from there.
Since I’m on a shared hoster I have limited possibilities for further debugging; one thing I can do is have a look into the apache error log – which doesn’t seem to contain any entries related to the problem described above.

Any ideas?

tocrass

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Did you try to execute the CLI “cache:flush” command? And is the ‘_assets/’ directory created? In composer mode this is done through the dumpautoload - unsure right now how in classic mode you can dump the autoloader via the CLI command if the Install tool doesn’t let you in…

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Hi Garvin, thanks for your advice! I performed cache:flush and dumpautoload right after switching the symlink. No _assets directory was created (at least not within my webroot – where exactly is it supposed to show up anyway?), but I finally could enter the install tool after creating the typo3conf/ENABLE_INSTALL_TOOL file. Everything’s fine now.

Thanks again – tocrass

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