No transform available between EPSG:21781 and EPSG:2056

[romainbh]

Describe the bug QGIS shows an error message "No transform available between EPSG:21781 and EPSG:2056" when your project is in EPSG:2056 or 21781 and your layer in EPSG:21781 or 2056 (not the same EPSG in the project/the layer). This occurs only with the latest update made by OSGeo4W (made on 2019.11.18). Tested with a blank user profile and a new installation of QGIS. Here is a GPKG with two layers, one per EPSG

When you try to download "proj-datumgrid-europe-latest.zip" and install CHENyx06a.gsb, an other error message says that QGIS can't access to the proj folder in the default profile folder.

How to Reproduce

1. Create a blank project and set the EPSG in 2056 or 21781
2. Add a layer that is in EPSG:21781 or 2056 (not the same as the project)
3. See the error message

QGIS and OS versions

Version de QGIS 3.10.0-A Coruña Révision du code 6ffa89eb3e Compilé avec Qt 5.11.2 Utilisant Qt 5.11.2 Compilé avec GDAL/OGR 3.0.2 Utilisé avec GDAL/OGR 3.0.2 Compilé avec GEOS 3.8.0-CAPI-1.13.1 Utilisé avec GEOS 3.8.0-CAPI-1.13.1 Compiled against SQLite 3.29.0 Running against SQLite 3.29.0 Version du client PostgreSQL 11.5 Version de SpatiaLite 4.3.0 Version de QWT 6.1.3 Version de QScintilla2 2.10.8 Compilé avec PROJ 6.2.1 Fonctionne avec PROJ Rel. 6.2.1, November 1st, 2019 OS Version Windows 10 (10.0) Extensions Python actives changeDataSource; DataPlotly; disconnected-islands; geomapfish_locator; geometry_paster; GroupStats; LAStools; MemoryLayerSaver; mmqgis; networks; NNJoin; pdaltools; plugin_reloader; pointsamplingtool; profiletool; qchainage; qgis_resource_sharing; quick_map_services; refFunctions; searchlayers; SelvansGeo; splitmultipart; SpreadsheetLayers; db_manager; MetaSearch; processing; qgis2web

[gioman]

@romainbh duplicate of https://github.com/qgis/QGIS/issues/32795 ?

[romainbh]

@romainbh duplicate of #32795 ?

It seems to be a duplicate, sorry I didn't find the other post.