Check DB log, nginx log etc …
Something are broken but on your server.
Maybe you have some plugins ? You can remove it from directory to check if it's better
Assistance on LimeSurvey forum and LimeSurvey core development are on my free time.
I'm not a LimeSurvey GmbH member. -
Professional support
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Plugins, theme and development
. I don't answer to private message.
