Please check your browser inspect as described in the support template while this is happening. Specifically both the Console and Network tabs.
Also:
- Set loglevel to the default (
2akaWARN) and monitor the Nextcloud log while reproducing the problem - If possible, please update to a supported maintenance release (v32.0.3 is outdated; v32.0.6 is the latest for the v32 series)
- If still stuck, post your actual Nextcloud config (output of
occ config:list system).