Runtime errors 46, 75 or 94 are permissions error, it is not specific to Pastel and means the folder or drive cannot be accessed because your user account in Windows does not have permission to access it.
To resolve this, it is better to let your IT / Network administrators look into your permissions if you do not know how to set them yourself.
This needs to be done on both your server and any workstations Pastel is installed on.
If there is still a problem after setting permissions on the Windows users, please try making exceptions on the Firewall or Anti Virus.
You can also try disabling Windows User Account Control (UAC) - a guide on how to do this can be found here:
Please note, if the Windows user is part of a group on the network, ensure that every group they are part of has full control as well and that there is not a group policy in place preventing access to the Pastel folders.