FirebaseCrashlytics auto upload-symbols problem

I'm trying to implement new FirebaseCrashlytics in my iOS app and having some issues and some things are not clear at all.

As per Upgrade doc in step 3, I have to add following run script:

${PODS_ROOT}/FirebaseCrashlytics/run
/path/to/pods/directory/FirebaseCrashlytics/upload-symbols

so, in my case it is:

"${PODS_ROOT}/FirebaseCrashlytics/run"
"${PODS_ROOT}/FirebaseCrashlytics/upload-symbols"

But compile was failing because:

Running upload-symbols in Build Phase mode
Validating build environment for Crashlytics...
Validation succeeded. Exiting because upload-symbols was run in validation mode
[31merror: No Google App ID or Google Services file provided[0m
Command PhaseScriptExecution failed with a nonzero exit code

If I delete upload-symbols line it is working fine, I'm getting crashes in Dashboard, but as far as I understand this upload-symbols has to upload dSYM files of app users, so I have no worry about this. Means I still need it...

So I tried to replace them:

"${PODS_ROOT}/FirebaseCrashlytics/upload-symbols"
"${PODS_ROOT}/FirebaseCrashlytics/run" 

And it started to compile.

I did a force crash and got it in Dashboard, but also I got:

Does it mean that it is not working and it is must be after run, so I continued and finished with:

"${PODS_ROOT}/FirebaseCrashlytics/run"
"${PODS_ROOT}/FirebaseCrashlytics/upload-symbols" -gsp "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.app/GoogleService-Info.plist" -p ios "${DWARF_DSYM_FOLDER_PATH}/${DWARF_DSYM_FILE_NAME}/Contents/Resources/DWARF/${TARGET_NAME}"

Now I was able to compile, but still getting optional dSYM in Dashboard.

Now I'm completely lost, if anyone can clarify it would be great.

PS: I'm able to use upload-symbols from terminal, but it is kind of manual job.

Few more questions as a discussion:

1. Why in Upgrade docs it is run and upload script, but in Get started only run?
2. In Upgrade docs it is exact path for ${PODS_ROOT}/FirebaseCrashlytics/run but not exact for /path/to/pods/directory/FirebaseCrashlytics/upload-symbols they are same folder, why not use same?
3. in Get started docs there are input files and one of them is $(SRCROOT)/$(BUILT_PRODUCTS_DIR)/$(INFOPLIST_PATH) why they are using (, not {?
4. This path $(SRCROOT)/$(BUILT_PRODUCTS_DIR)/$(INFOPLIST_PATH) is path to Info.plist file, not to GoogleService-Info.plist why they gave it then?)