IF YOU HAD RECENTLY DOWNLOADED A VERSION THAT DOES NOT LOAD, PLEASE REINSTALL WITH THIS VERSION.
Gaia Dimension is now out for 1.15.2! No new features have been implemented, however some features have been omitted due to changes introduced in 1.15. Namely speaking, sky rendering has been altered, so stars that appeared in Purple Agate skies no longer render, clouds are white instead of being coloured per biome, and skies don't smoothly change colour. There may be some other bugs, however it is in a playable state, so feel free to test it out and report any issues.