Unable to find explicit activity class

[Lavkushwaha]

Logs:

D/TAGPay (29767): doPayment
D/TAG (29767): I am Here Android
D/Checkout Request Object(29767): RequestJson [merchant=Merchant [identifier=, responseType=, description=, responseEndpointURL=, webhookType=, webhookEndpointURL=], transaction=Transaction [requestType=, token=, identifier=, type=, subType=, currency=, amount=, dateTime=, reference=, description=, isRegistration=N, deviceIdentifier=Android, forced3DSCall=N, smsSending=, merchantInitiated=N, securityToken=], cart=Cart [identifier=, reference=, description=, item=[]], consumer=Consumer [identifier=, emailID=, mobileNumber=, accountNo=, accountHolderName=, aadharNo=, accountType=], payment=Payment [method=Method [type=, token=], instrument=Instrument [token=, action=, type=, subType=, identifier=, alias=, holder=Holder [name=, address=Address [street=, city=, state=, county=, country=, zipCode=]], provider=, acquirer=, processor=, issuer=, iFSC=, mICR=, bIC=, iBAN=, issuance=Issuance [month=, year=, dateTime=], expiry=Expiry [month=, year=, dateTime=], verificationCode=, authentication=Authentication [type=, subType=, token=]], instruction=Instruction [identifier=, reference=, description=, action=D, type=, limit=, amount=, occurrence=, frequency=, validity=, startDateTime=, endDateTime=, debitDay=, debitFlag=N]]]
I/Timeline(29767): Timeline: Activity_launch_request time:820229446
D/TAG (29767): Unable to find explicit activity class {com.paynimo.paymentgateway/com.paynimo.android.payment.PaymentModesActivity}; have you declared this activity in your AndroidManifest.xml?
I/flutter (29767): Failed to get data: 'Unable To Payment'.
D/TAG (29767): User pressed back button
D/ViewRootImplToast: hardware acceleration = true , fakeHwAccelerated = false, sRendererDisabled = false, forceHwAccelerated = false, sSystemRendererDisabled = false
I/Toast (29767): Show toast from OpPackageName:com.paynimo.paymentgateway, PackageName:com.paynimo.paymentgateway
E/GraphicExt(29767): GraphicExtModuleLoader::CreateGraphicExtInstance false
D/Surface (29767): Surface::connect(this=0x7bd4eb9000,api=1)
D/mali_winsys(29767): EGLint new_window_surface(egl_winsys_display *, void *, EGLSurface, EGLConfig, egl_winsys_surface **, EGLBoolean) returns 0x3000
D/Surface (29767): Surface::setBufferCount(this=0x7bd4eb9000,bufferCount=3)
D/Surface (29767): Surface::allocateBuffers(this=0x7bd4eb9000)
D/Surface (29767): Surface::disconnect(this=0x7bd4eb9000,api=1)
D/View (29767): [Warning] assignParent to null: this = android.widget.LinearLayout{22bef2d V.E...... ......ID 0,0-766,316}
D/Surface (29767): Surface::disconnect(this=0x7b8447c000,api=1)
D/ViewRootImpl(29767): setSurfaceViewCreated, created:false
D/Surface (29767): Surface::disconnect(this=0x7b8447c000,api=-1)
I/GED (29767): ged_boost_gpu_freq, level 100, eOrigin 2, final_idx 27, oppidx_max 27, oppidx_min 0
D/Surface (29767): Surface::disconnect(this=0x7b8447a000,api=1)
V/PhoneWindow(29767): DecorView setVisiblity: visibility = 4, Parent = android.view.ViewRootImpl@974627e, this = DecorView@80483df[MainActivity]