Hi Isabel,
I installed Moodle desktop application and I see error for lesson:
Text from Preview tab:
<br />
<b>Notice</b>: Undefined property: stdClass::$attemptsremaining in <b>/var/www/moodle/mod/lesson/locallib.php</b> on line <b>3412</b><br />
{"newpageid":43,"inmediatejump":true,"nodefaultresponse":false,"feedback":"","attemptsremaining":null,"correctanswer":false,"noanswer":false,"isessayquestion":false,"maxattemptsreached":false,"response":"","studentanswer":"","userresponse":"","reviewmode":false,"ongoingscore":"","progress":null,"displaymenu":false,"messages":[],"warnings":[]}
Text from Response tab:
<br />
<b>Notice</b>: Undefined property: stdClass::$attemptsremaining in <b>/var/www/moodle/mod/lesson/locallib.php</b> on line <b>3412</b><br />
{"newpageid":43,"inmediatejump":true,"nodefaultresponse":false,"feedback":"","attemptsremaining":null,"correctanswer":false,"noanswer":false,"isessayquestion":false,"maxattemptsreached":false,"response":"","studentanswer":"","userresponse":"","reviewmode":false,"ongoingscore":"","progress":null,"displaymenu":false,"messages":[],"warnings":[]}
Test from Headers (I've replaced sensitive information to ######):
Request URL: https://###########/moodle/webservice/rest/server.php?moodlewsrestformat=json&wsfunction=mod_lesson_process_page
Request Method: POST
Status Code: 200 OK
Remote Address: ##########:443
Referrer Policy: no-referrer-when-downgrade
Accept: application/json, text/plain, */*
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US
Connection: keep-alive
Content-Length: 386
Content-Type: application/x-www-form-urlencoded
Cookie: MoodleSession=#########
Host: ##############
Origin: file://
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) moodledesktop/3.7.0 Chrome/69.0.3497.106 Electron/4.0.1 Safari/537.36 MoodleMobile
moodlewsrestformat: json
wsfunction: mod_lesson_process_page
lessonid: 4
pageid: 27
data[0][name]: id
data[0][value]: 192
data[1][name]: jumpto
data[1][value]: -1
data[2][name]: pageid
data[2][value]: 27
data[3][name]: sesskey
data[3][value]: #########
review: 0
moodlewssettingfilter: true
moodlewssettingfileurl: true
wsfunction: mod_lesson_process_page
wstoken: ########
Regards,
Mykola