After setting up SSL, Dark Theme won't work any more

I just set up a new controller with 2.492.2 and had my user ID set up with the dark theme. After switching to SSL, themes no longer work at all. I can choose one and click save/apply and nothing. I’d love to offer this to my users.

Thanks!
Andy
Jenkins setup:
Jenkins: 2.492.2
OS: Linux - 5.15.0-134-generic
Java: 17.0.14 - Ubuntu (OpenJDK 64-Bit Server VM)

active-directory:2.39
ant:513.vde9e7b_a_0da_0f
antisamy-markup-formatter:173.v680e3a_b_69ff3
apache-httpcomponents-client-4-api:4.5.14-269.vfa_2321039a_83
asm-api:9.7.1-97.v4cc844130d97
authentication-tokens:1.131.v7199556c3004
badge:2.7
bootstrap5-api:5.3.3-2
bouncycastle-api:2.30.1.80-256.vf98926042a_9b_
branch-api:2.1214.v3f652804588d
build-failure-analyzer:2.5.4
build-timeout:1.36
build-with-parameters:76.v9382db_f78962
caffeine-api:3.2.0-161.v691ef352cee1
checks-api:367.v18b_7f530e54a_
cloudbees-folder:6.985.va_f1635030cc5
command-launcher:118.v72741845c17a_
commons-lang3-api:3.17.0-84.vb_b_938040b_078
commons-text-api:1.13.0-153.v91dcd89e2a_22
conditional-buildstep:1.5.0
copyartifact:765.v0357cc6e6eb_3
credentials:1408.va_622a_b_f5b_1b_1
credentials-binding:687.v619cb_15e923f
cygpath:1.5
dark-theme:524.vd675b_22b_30cb_
disk-usage:1.3
display-url-api:2.209.v582ed814ff2f
docker-commons:451.vd12c371eeeb_3
docker-workflow:611.v16e84da_6d3ff
durable-task:587.v84b_877235b_45
echarts-api:5.6.0-2
eddsa-api:0.3.0-13.v7cb_69ed68f00
editable-choice:71.v02a291ebbe45
email-ext:1876.v28d8d38315b_d
emoji-symbols-api:16.0-26.v9818ff7423f0
envinject:2.926.v69c9b_3896a_96
envinject-api:1.235.va_14c74f8f487
extensible-choice-parameter:237.v51568f37b_78e
external-monitor-job:221.v35059272565b_
fail-the-build-plugin:5.v153b_2c826ef0
favorite:2.225.v68765b_b_a_1fa_3
file-parameters:358.v9ed4456a_169a_
font-awesome-api:6.7.2-1
git:5.7.0
git-client:6.1.2
git-parameter:0.11.0
git-tag-message:1.7.1
github:1.42.0
github-api:1.321-478.vc9ce627ce001
github-branch-source:1810.v913311241fa_9
gradle:2.14.1
groovy-postbuild:272.v52a_03efb_8653
gson-api:2.12.1-113.v347686d6729f
hidden-parameter:414.vfe0a_8b_052546
htmlpublisher:424.va_e57f1253461
instance-identity:203.v15e81a_1b_7a_38
ionicons-api:82.v0597178874e1
jackson2-api:2.18.3-402.v74c4eb_f122b_2
jakarta-activation-api:2.1.3-2
jakarta-mail-api:2.1.3-2
javadoc:310.v032f3f16b_0f8
javax-activation-api:1.2.0-8
javax-mail-api:1.6.2-11
jaxb:2.3.9-133.vb_ec76a_73f706
jdk-tool:83.v417146707a_3d
jfrog:1.5.8
jjwt-api:0.11.5-120.v0268cf544b_89
job-import-plugin:122.v35289550f1e6
jobConfigHistory:1305.vf20a_356586b_8
joda-time-api:2.13.1-115.va_6b_5f8efb_1d8
jquery3-api:3.7.1-3
jsch:0.2.16-95.v3eecb_55fa_b_78
json-api:20250107-125.v28b_a_ffa_eb_f01
json-path-api:2.9.0-148.v22a_7ffe323ce
junit:1317.v5b_35d792b_06a_
last-changes:2.8.0
ldap:776.vddf3e325103b_
leastload:62.vfa_8830902733
log-parser:2.3.7
mail-watcher-plugin:1.20
mailer:489.vd4b_25144138f
mapdb-api:1.0.9-44.va_1e1310c9118
matrix-auth:3.2.4
matrix-project:845.vffd7fa_f27555
maven-plugin:3.25
metrics:4.2.21-464.vc9fa_a_0d6265d
mina-sshd-api-common:2.14.0-143.v2b_362fc39576
mina-sshd-api-core:2.14.0-143.v2b_362fc39576
next-build-number:66.v4b_4762172d53
nodelabelparameter:759.vb_b_e95db_f3251
okhttp-api:4.11.0-183.va_87fc7a_89810
oss-symbols-api:308.v0c48656b_15c1
pam-auth:1.12
parameterized-trigger:840.v3c7d4a_a_5e6c7
pipeline-build-step:557.v95d96f77b_2b_8
pipeline-github-lib:65.v203688e7727e
pipeline-graph-analysis:231.v56354571a_da_0
pipeline-graph-view:423.v765c49ca_da_3f
pipeline-groovy-lib:752.vdddedf804e72
pipeline-input-step:517.vf8e782ee645c
pipeline-milestone-step:127.vb_52887ca_3b_6d
pipeline-model-api:2.2247.va_423189a_7dff
pipeline-model-definition:2.2247.va_423189a_7dff
pipeline-model-extensions:2.2247.va_423189a_7dff
pipeline-rest-api:2.37
pipeline-stage-step:322.vecffa_99f371c
pipeline-stage-tags-metadata:2.2247.va_423189a_7dff
pipeline-stage-view:2.37
plain-credentials:183.va_de8f1dd5a_2b_
plugin-util-api:6.0.0
powershell:2.3
rebuild:338.va_0a_b_50e29397
resource-disposer:0.25
run-condition:243.v3c3f94e46a_8b_
scm-api:704.v3ce5c542825a_
script-security:1373.vb_b_4a_a_c26fa_00
show-build-parameters:1.0
agent-utilization-plugin:1.8
snakeyaml-api:2.3-123.v13484c65210a_
ssh-credentials:355.v9b_e5b_cde5003
ssh-slaves:3.1031.v72c6b_883b_869
sshd:3.353.v2b_d33c46e970
structs:343.vdcf37b_a_c81d5
subversion:1287.vd2d507146906
theme-manager:278.v2e3c063e42cc
throttle-concurrents:2.16
timestamper:1.28
token-macro:444.v52de7e9c573d
trilead-api:2.192.vc50a_d147e369
variant:70.va_d9f17f859e0
veracode-scan:24.2.23.0
versionnumber:234.v315d3b_3cb_fb_5
windows-cloud:1.0.1
workflow-aggregator:600.vb_57cdd26fdd7
workflow-api:1363.v03f731255494
workflow-basic-steps:1079.vce64b_a_929c5a_
workflow-cps:4043.va_fb_de6a_a_8b_f5
workflow-durable-task-step:1405.v1fcd4a_d00096
workflow-job:1505.vea_4b_20a_4a_495
workflow-multibranch:803.v08103b_87c280
workflow-scm-step:437.v05a_f66b_e5ef8
workflow-step-api:700.v6e45cb_a_5a_a_21
workflow-support:961.v51869f7b_d409
ws-cleanup:0.48

Is the url properly configured under which you can reach Jenkins? Is it maybe still using the non http url?

This fixed it. Thank you very much!