I am facing a similar issue.
Last week I tried to run the InVEST Visitation: Recreation and Tourism model, with and without computing a regression using the two different aoi, and it worked well.
However, today I am not being able to run the model anymore, using the same aoi. It keeps trying to contact the server without success.
I also tried with the recreation model sample data and got the same log file:
Showing messages with level INFO and higher
2021-03-01 14:13:55,916 utils.prepare_workspace(123) INFO Writing log messages to C:/InVEST_3.9.0_x64/sample_data/recreation\InVEST-Recreation-Model-log-2021-03-01–14_13_55.txt
2021-03-01 14:13:55,921 model._logged_target(1646) Level 100 Starting model with parameters:
Arguments for InVEST natcap.invest.recreation.recmodel_client 3.9.0:
2021-03-01 14:13:56,257 recmodel_client._grid_vector(549) INFO gridding aoi
2021-03-01 14:14:24,285 recmodel_client._retrieve_photo_user_days(461) INFO Contacting server, please wait.
Thank you for your help.