I solved it:
I noticed, that I had a second Plugin «WP Lightbox 2» activated. After deactivating «WP Lightbox 2» the issue was gone and «Photo Gallery by 10Web» worked fine. I suppose they disturb each other.
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This reply was modified 4 years, 7 months ago by lukas2018.
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This reply was modified 4 years, 7 months ago by lukas2018.
