3CX-Zoho CRM Integration Specialist

I'm seeking an experienced developer to integrate 3CX with Zoho CRM.

Key requirements:
- Integration of 3CX with Zoho CRM
- Pop-up notifications on inbound calls

Ideal Skills and Experience:
- Proficiency in 3CX and Zoho CRM
- Experience with CRM integrations
- Strong understanding of call management systems
- Ability to implement real-time notifications

Please provide examples of similar work done.

it gives that error

rror occured while accessing CRM. Please check log provided.
Started OAuthGetAccessToken
Request text: https://accounts.zoho.com
Request form value code set to 1000.0ab625d700954adc083c0f1081b3e463.bb2f6da3b84aadf6aab523d8de2d04dc
Request form value grant_type set to authorization_code
Request form value client_id set to 1000.HCQ45PBTW5DCPER652LHCGWYG2WZRX
Request form value client_secret set to 8653a0da52dba7e8abb57cbcb2576cae0f86e3c1ff
Request form value scope set to ZohoCRM.coql.READ,ZohoCRM.modules.accounts.READ,ZohoCRM.modules.leads.READ,ZohoCRM.modules.contacts.READ,ZohoCRM.modules.contacts.CREATE,ZohoCRM.modules.calls.CREATE,ZohoCRM.modules.tasks.CREATE,ZohoCRM.users.READ
Request form value redirect_uri set to https://xxxxx.3cx.ca/api/oauth2crm
Request form value code_verifier set to AVpc1a7ycY8AGf-tAT3_zTvgmJ2Y738rVNU7f95TTC_hm2xYcQO2YKYYRMGOM3RnY2VEHBxFSC1yu7JaCt_fAw
Request form value state set to 91acdffd-4f87-4e09-95ef-6b0bb103806f
Response text: ****
Response finished
Finished OAuthGetAccessToken
System.Exception: CRM call result is empty or null
at ManagementConsoleJS.Controllers.OAuth2CrmController.OAuth(String state, IPhoneSystem phoneSystem, CrmProcessorFactoryDelegate crmProcessorFactory, IMemoryCache cache, CrmIntegrationService crmIntegrationService, ICrmTemplateProvider crmTemplateProvider)