We just released Maps Marker Pro v4.0.1 which includes several fixes based on feedback from different users. So in case you had issues with the migration tool in v4.0 (blank maps if Stamen basemaps or OpenStreetMap variants were used in v3.1.1 or if you used a custom icon directory for example, please re-run the migration tool with v4.0.1).
Additionally we fixed an issue with blank maps on certain zoom levels, so this update is – as always – highly recommended, also for those who did not experience any migration issues.
If you did not update to v4.0 yet, please see the release notes from v4.0 for installation instruction, migration tutorial and post installation tasks.
If you still experience any issues, please submit a helpdesk ticket.
Happy mapping!
Changelog for version 4.0.1 - released on 21.10.2018 (release notes)
 | allow zoom level of up to 23 for markers | |
 | fix blank maps on certain zoom levels | |
| fix default basemaps not migrating properly | |
| migration tool failed if custom icon directory did not exist | |
| migration tool did not support custom icon directories | |
| marker assignments were not saved correctly | |
| Yoast sitemap integration (XML validation failed) | |
| "popup on hover" did not show popup on click on touch devices | |
| directions link in popuptext was broken | |
| use correct JS data types for shortcodes and fix callback | |
 | updated Czech translation thanks to Viktor Kleiner and Vlad Kuzba | → contribute |
| updated Russian translation thanks to Ekaterina Golubina (supported by Teplitsa of Social Technologies - http://te-st.ru) and Vyacheslav Strenadko, http://slavblog.ru | → contribute |
| updated Swedish translation thanks to Olof Odier, Tedy Warsitha, Dan Paulsson, Elger Lindgren, Anton Andreasson and Tony Lygnersjö | → contribute |