Let’s try to do the following:

just upload h5 model to your local drive - for checking file integrity
if step 1 is OK, then go to step 3, if not - your problem is this saved model as h5 file
I propose to try to use this code for a load of your model just a simple file:

!pip3 install googledrivedownloader # custom library for reading from gdrive
from google_drive_downloader import GoogleDriveDownloader as gdd
gdd.download_file_from_google_drive(file_id=‘file_ID’,
dest_path=‘path_to_your_model’,
unzip=False)
#* file_ID - it’s an identification of a file when you share it by the link, such as “1-CffbOeasBB6s5JkDFuD7zgGkli1aR_f”
#* path_to_your_model - path for your file, such as ./content/gdrive/MyDrive/TF/tf_model.h5 …also will try to a bit change this path in different variants