Help, please, anyone? :-(

make sure you are uploading to siterootdirectory/packages and not siterootdirectory/concrete/packages/

Thanks for your answer!

As for making sure to upload it to the right place: I certainly did. (Otherwise it would'nt have shown up on the dashboard in the first place, I think.)

Any other solution theories? :-(

Try to check your concrete5 database table 'blocktypes' and see if it's present there. What value does the field 'btIsInternal' have?

Thanks for your answer!

The table "BlockTypes" is present. However, it only contains entries for the standard blocks included with conrete5. In spite of that, my new addons which I have "installed", do show up in the dashboard as correctly installed, but do not appear when editing pages. The field "btIsInternal" has the value 0 for all the standard blocks.

is it a completely new install or did you upgrade an existing page?

Just to be sure.... the addon installed is shown in the dashboard left column 'currently installed' right? and not in the right column 'downloaded and ready to install'.

Some addons don't provide blocks, but provide other functionality.

Can you paste the contents of your Dashboard > Debug > Environment info? That'll show what packages are installed and some other useful info.

@Hkofoed: Completely new install, and yes, they really show up as installed.

@ryan:
# concrete5 Version
5.4.1.1

# concrete5 Packages
Currency Converter (1.0), Login (1.0).

# concrete5 Overrides
blocks/remo_equation

# Server Software
Apache/2.2

# Server API
bpmd-cgi

# PHP Version
5.3.3

# PHP Extensions
, bcmath, bz2, calendar, Core, ctype, date, dom, ereg, exif, fileinfo, filter, ftp, gd, gettext, gmp, hash, iconv, intl, json, libxml, mbstring, mcrypt, mhash, mysql, mysqli, mysqlnd, openssl, pcre, PDO, pdo_mysql, pdo_pgsql, pdo_sqlite, pgsql, Phar, Reflection, session, SimpleXML, SPL, SQLite, sqlite3, standard, tokenizer, wddx, xml, xmlreader, xmlwriter, xsl, zip, zlib.

# PHP Settings
log_errors_max_len - 2048
max_execution_time - 12
max_file_uploads - 20
max_input_nesting_level - 64
max_input_time - 20
memory_limit - 64M
post_max_size - 132M
safe_mode - Off
safe_mode_exec_dir - <i>no value</i>
safe_mode_gid - Off
safe_mode_include_dir - <i>no value</i>
sql.safe_mode - Off
upload_max_filesize - 128M
mysql.max_links - Unlimited
mysql.max_persistent - 0
mysqli.max_links - Unlimited
mysqli.max_persistent - 0
pcre.backtrack_limit - 100000
pcre.recursion_limit - 100000
pgsql.max_links - Unlimited
pgsql.max_persistent - 0
session.cache_limiter - nocache
session.gc_maxlifetime - 7200
safe_mode_allowed_env_vars - PHP_
safe_mode_protected_env_vars - LD_LIBRARY_PATH


Thanks for your help so far, guys!

Any ideas, *anyone*? Still having the same problem! :-(

What addons are you trying to install?
Can you take a screenshot of your add functionality page?

Is there any error message that's displayed?
Have you taken a look at this page?
http://www.concrete5.org/marketplace/how_to_install_add_ons_and_the...

I have the same problem here. And I'm not sure what led to it. I can't install any add-ons or themes through marketplace.
I have two sites with two different concrete5 versions and i have this problem with both! First one with has version 5.4.0.5 and it throws following error in error.log:


The other one (5.4.1.1) doesn't log any errors but shows me:


Any ideas why it's happening?

I have similar problem; addon seems to be installed (see left column) but there is an error and the addon is not properly installed.

I'm also facing the same problem. None of the add-ons can be installed.

Maybe you can try the solutions found in this link and see if it works for you,
http://www.concrete5.org/developers/bugs/5-4-1-1/canand039t-install...