I upgraded to Magento CE 2.1.8 and now the REST API quit working.
When I go to:
http://somedomain.com/rest/V1/customers/me
I get this:
<response>
<message>Consumer is not authorized to access %resources</message>
<parameters>
<resources>self</resources>
</parameters>
</response>
In admin:
Cookie Lifetime 3600
Cookie Path /
Cookie Domain my url
Use HTTP Only yes
Cookie restriction mode yes
Any ideas?