SOLVED Can't migrate Rocket.Chat

[potemkin_ai]

Hello! Trying to migrate Rocket.Chat from one Cloudron to another. Versions are the same (Rocket.Chat 3.18.1; v6.3.6 (Ubuntu 18.04.4 LTS) migrates to Cloudron 6.3.6 (Ubuntu 18.04.5 LTS)), facing the same error - over and over again:

An error occurred during the import operation: Addons Error: Error restoring mongodb. Status code: 500 message: Command failed: mongorestore -u root -p b1992979c2889d8f32cca62b191f916b8fb3c0f6e182f6b2d4bdb457a9d503f556557c45740b3e6e76b3c34afd3718d203c3d0b7d5b70fe776256a00c367a5984262fdf46cbaad949120e7c7fb1f2ae48cc724154e8747767f7a8da995d13f9059f25de45e43c96e712aa4082c93316edb4247bc56b9b830e6de2f381c0bbefb --authenticationDatabase admin --quiet -v --db "80b5bded8d6b4feb" "/tmp/80b5bded8d6b4feb"

If I proceed with 'Retry Task' - it's kind of processing Ok, but Rocket.Chat instance is like a new (so no content migrated).

MongoDB seems to be fine in size, increased the memory up to 384Mb, but this doesn't seem to help.

Any help would be much appreciated!

[potemkin_ai]

Found an issue: MongoDB needed up 600Mb of RAM (to be adjusted in services page).