How to connect to an Oracle Autonomous Data Warehouse with a 3rd party IDE (DataGrip)

I'm trying to connect to a Oracle Autonomous Data Warehouse database with Jetbrains DataGrip. Oracle provides me with a wallet file (a zip), with contains tnsnames.ora, a keystore, ojdbc.properties, and some other files.

I'm having a lot of trouble using this information to connect to the database using DataGrip. I found a thread on the DataGrip support forums, but I'm not having any luck with that either.

Jetbrains support thread: https://intellij-support.jetbrains.com/hc/en-us/community/posts/360001792539-Connect-with-Oracle-Cloud
Relevant Oracle documentation: https://docs.oracle.com/en/cloud/paas/autonomous-data-warehouse-cloud/adwud/connect-using-client-application.html

What I did:
1. Created the 'TNS_ADMIN' environment variable and set it to:
C:\\Users\\xxx\\Documents\\[folder with wallet files]
2. Added the Oracle JDBC driver files (ojdbc8.jar, osdt_cert.jar, oraclepki.jar, osdt_core.jar) to the standard Oracle driver in DataGrip
3. edited the 'sqlnet.ora' file to include the path to the wallet files
4. Added the following to the Data Source VM Options:

-Doracle.net.tns_admin=C:\\Users\\xxx\\Documents\\[folder with wallet files]
-Djavax.net.ssl.trustStore=truststore.jks
-Djavax.net.ssl.trustStorePassword=[password]
-Djavax.net.ssl.keyStore=keystore.jks    
-Djavax.net.ssl.keyStorePassword=[password]
-Doracle.net.ssl_server_dn_match=true    
-Doracle.net.ssl_version=1.2

5. Set connection type to URL only
6. Tried different connection strings in the URL field:

jdbc:oracle:thin:@//adb.eu-frankfurt-1.oraclecloud.com:1522/xxxxxx_adw1_high.adwc.oraclecloud.com?TNS_ADMIN=C:\\Users\\xxx\\Documents\\[folder with wallet files]

jdbc:oracle:thin:@xxxxxx_adw1_high.adwc.oraclecloud.com?TNS_ADMIN=C:\\Users\\xxx\\Documents\\[folder with wallet files]

jdbc:oracle:thin:@//adb.eu-frankfurt-1.oraclecloud.com:1522/mnr6yzqr22jgywm_adw1_high.adwc.oraclecloud.com

Result:

Connection to ADW1 failed.  
[08006][17002] IO Error: Got minus one from a read call, connect lapse 32 ms.,  
Authentication lapse 0 ms.  

I have also tried using the 'Service name' and 'TNS' connection types and filled in the info from tnsnames.ora. No dice, same error.

Also tried explicitely setting the 'tcp.validnode_checking' parameter to null.

(The connection works fine with sqldeveloper)

What's the proper way to do this?