I had a similar issue. The issue was temporarily solved by reverting back to version 15.0 via https://ww.wp.xz.cn/plugins/acf-openstreetmap-field/advanced/ – older version.
The error I get in the backend with the latest version, 15.6, via the console is: Uncaught No such provider (OpenSeaMap).
Refer to the following file:
… /wp-content/plugins/acf-openstreetmap-field/assets/js/src/js/lib/leaflet/tile-layer-provider.js.
Observation: It seems that the code is somehow referencing source files of the project that are not in the plugin when looking.
I tried to manipulate the /etc/leaflet-providers.json list to remove the OpenSeaMap, but it’s not as simple as removing the provider. Removing the provider just causes the next in the JSON list to be the issue.
FWP triggered via cron job, posts get Pubslihed directly – no images cached
Is there any update on this, i have the problem too?