I got this error while creating company

SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data
report_error request.js:512
500 request.js:214
call request.js:345
jQuery 6
call request.js:268
call request.js:105
h save.js:245
n save.js:23
save save.js:272
validate_and_save form.js:808
promise callbackfrappe.run_serially/< dom.js:262
run_serially dom.js:260
validate_and_save form.js:799
save form.js:738
save form.js:735
Save toolbar.js:670
set_action page.js:268
jQuery 7
trigger_primary_action desk.js:496
setTimeout handler
trigger_primary_action desk.js:491
action keyboard.js:190
s keyboard.js:51
setup keyboard.js:12
jQuery 2

how to fix this.please help