I just installed ODOO community version. 

Everything seems okay, but I cannot install app. When I attempted to install EMPLOYEE APP I got the following error. Any help will be appreciated. Thanks

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/odoo/http\.py",\ line\ 1584,\ in\ _serve_db
\ \ \ \ return\ service_model\.retrying\(self\._serve_ir_http,\ self\.env\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/service/model\.py",\ line\ 134,\ in\ retrying
\ \ \ \ result\ =\ func\(\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/http\.py",\ line\ 1613,\ in\ _serve_ir_http
\ \ \ \ response\ =\ self\.dispatcher\.dispatch\(rule\.endpoint,\ args\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/http\.py",\ line\ 1810,\ in\ dispatch
\ \ \ \ result\ =\ self\.request\.registry\['ir\.http'\]\._dispatch\(endpoint\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/addons/base/models/ir_http\.py",\ line\ 149,\ in\ _dispatch
\ \ \ \ result\ =\ endpoint\(\*\*request\.params\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/http\.py",\ line\ 699,\ in\ route_wrapper
\ \ \ \ result\ =\ endpoint\(self,\ \*args,\ \*\*params_ok\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/addons/web/controllers/dataset\.py",\ line\ 46,\ in\ call_button
\ \ \ \ action\ =\ self\._call_kw\(model,\ method,\ args,\ kwargs\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/addons/web/controllers/dataset\.py",\ line\ 33,\ in\ _call_kw
\ \ \ \ return\ call_kw\(request\.env\[model\],\ method,\ args,\ kwargs\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/api\.py",\ line\ 461,\ in\ call_kw
\ \ \ \ result\ =\ _call_kw_multi\(method,\ model,\ args,\ kwargs\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/api\.py",\ line\ 448,\ in\ _call_kw_multi
\ \ \ \ result\ =\ method\(recs,\ \*args,\ \*\*kwargs\)
\ \ File\ "",\ line\ 2,\ in\ button_immediate_install
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/addons/base/models/ir_module\.py",\ line\ 76,\ in\ check_and_log
\ \ \ \ return\ method\(self,\ \*args,\ \*\*kwargs\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/addons/base/models/ir_module\.py",\ line\ 491,\ in\ button_immediate_install
\ \ \ \ return\ self\._button_immediate_function\(type\(self\)\.button_install\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/addons/base/models/ir_module\.py",\ line\ 615,\ in\ _button_immediate_function
\ \ \ \ registry\ =\ modules\.registry\.Registry\.new\(self\._cr\.dbname,\ update_module=True\)
\ \ File\ "",\ line\ 2,\ in\ new
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/tools/func\.py",\ line\ 87,\ in\ locked
\ \ \ \ return\ func\(inst,\ \*args,\ \*\*kwargs\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/modules/registry\.py",\ line\ 90,\ in\ new
\ \ \ \ odoo\.modules\.load_modules\(registry,\ force_demo,\ status,\ update_module\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/modules/loading\.py",\ line\ 487,\ in\ load_modules
\ \ \ \ processed_modules\ \+=\ load_marked_modules\(cr,\ graph,
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/modules/loading\.py",\ line\ 371,\ in\ load_marked_modules
\ \ \ \ loaded,\ processed\ =\ load_module_graph\(
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/modules/loading\.py",\ line\ 207,\ in\ load_module_graph
\ \ \ \ registry\.init_models\(cr,\ model_names,\ \{'module':\ package\.name\},\ new_install\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/modules/registry\.py",\ line\ 535,\ in\ init_models
\ \ \ \ self\.check_indexes\(cr,\ model_names\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/modules/registry\.py",\ line\ 596,\ in\ check_indexes
\ \ \ \ sql\.create_index\(cr,\ indexname,\ tablename,\ \[expression\],\ method,\ where\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/tools/sql\.py",\ line\ 290,\ in\ create_index
\ \ \ \ cr\.execute\(f'CREATE\ INDEX\ "\{indexname\}"\ ON\ "\{tablename\}"\ USING\ \{method\}\ \(\{args\}\)\{where\}'\)
\ \ File\ "/usr/lib/python3/dist\-packages/odoo/sql_db\.py",\ line\ 313,\ in\ execute
\ \ \ \ res\ =\ self\._obj\.execute\(query,\ params\)
psycopg2\.errors\.UndefinedFunction:\ function\ jsonb_path_query_array\(jsonb,\ unknown\)\ does\ not\ exist
LINE\ 1:\ \.\.\.INDEX\ "hr_job_name_index"\ ON\ "hr_job"\ USING\ gin\ \(\(jsonb_path\.\.\.
\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \^
HINT:\ \ No\ function\ matches\ the\ given\ name\ and\ argument\ types\.\ You\ might\ need\ to\ add\ explicit\ type\ casts\.


The\ above\ server\ error\ caused\ the\ following\ client\ error:
RPC_ERROR:\ Odoo\ Server\ Error
\ \ \ \ at\ makeErrorFromResponse\ \(http://45\.33\.198\.6:8069/web/assets/34\-7a5d6ad/web\.assets_backend\.min\.js:967:163\)
\ \ \ \ at\ XMLHttpRequest\.\ \(http://45\.33\.198\.6:8069/web/assets/34\-7a5d6ad/web.assets_backend.min.js:975:13)