@james , thanks for investigating this so quickly and finding the issue! Can confirm - works with English language.
My lesson learnt today: also search the closed issues on github 
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IT-KT
@IT-KT
Posts
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Issue: Entries not showing in 1.23.0 / Blank Dashboard - Items still viewable when entering the Asset Tag directly (Only affects German language user setting) -
Issue: Entries not showing in 1.23.0 / Blank Dashboard - Items still viewable when entering the Asset Tag directly (Only affects German language user setting) -
Issue: Entries not showing in 1.23.0 / Blank Dashboard - Items still viewable when entering the Asset Tag directly (Only affects German language user setting)After the latest Update to 1.23.0 (Snipe-IT 8.8.0) we can not "browse" anything.
Clicking on Items, Licenses, Users, etc. just shows a blank page, but it still shows the number of items in each category:
Entering an asset tag in the top right search opens the asset normally but viewing its history or any other tab also opens blank:
Restarting the app did not help.