element-desktop depends on electron19, witch is not available on manjaro yet. So electron19 should be added to stable, because you can not install element-destkop or update your system at the moment.
error message:
:: Synchronizing package databases...
core is up to date
extra is up to date
community is up to date
multilib is up to date
:: Starting full system upgrade...
resolving dependencies...
looking for conflicting packages...
error: failed to prepare transaction (could not satisfy dependencies)
:: installing electron (20.0.0-1) breaks dependency 'electron19' required by element-desktop
-> error installing repo packages