As topic states, the PayPal Express button is visible on both minicart and cart pages. The button works just fine.
On the checkout page, however, there is no PayPal option.
Settings are as follows:
magento_paypal is enabled magento_payment is enabled
Nothing present in debug.log, exception.log, or system.log, error console to indicate a problem.
No modules have been installed that would modify or interfere with PayPal.
It has worked in the past. The problem first showed up when I changed Transfer Shipping Options to Yes then back to No again.
I've tried clearing my local browser cache, deleting cookies, reentering PayPal credentials. On the server setup di:compile, setup:deploy-static-content, setup:upgrade, disabling and reenabling magento_paypal and so far nothing has fixed.
My staging server, with near-identical PayPal express settings works just fine. The only difference on that server is it uses Sandbox credentials. Any ideas?
CE Magento 2.1.8 running Apache 2.4.18 on Ubuntu 16.04, php 7.0.22